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When an tab is unchecked by setting the property IsChecked to false, then the first visible tab must be checked. But now the current tab is still in checked state.

Replication Procedure:

1.Run the attached sample

2.Select Tab 5.

3.Click the button Uncheck. ( To un check Tab5)

Observed Behavior:

First Tab was not selected. Still the Tab5 is selected.

Required behavior:

The First tab should be selected.